A good reference on mexico and travels there is Peoples Guide to Mexico.
Far more than just a Guidebook it delves into customs, feelings, societies
and so on.   Baja California is vast.  Long ago there was a sierra club book
called:

_Baja California and the Geography of Hope_
Text by Joseph Wood Krutch Photographs by Eliot Porter.

Long out of print, it will give you a sense of the place like no other
publication.  The lithography is Champions Kromekote, a magnificent and very
expensive photo reproduction publishing method.  Astonishingly realistic.

Sierra Club books 1967.  Your library may have a lending copy.  Well worth
the reading.

Web searches will turn up an astonishing number of tour purveyors of all
sizes and prices.

AAA (the autoclub) has a fine map and book on Baja.  Another source is
www.vagabundos.com, they have a bookstore on line I think.

The best idea is what Mark suggests, go there. South of San Quintin on the
Pacific side in the summer, it's cooler.  Pick up a phrasebook or Franklin
translator to help with the language change, be respectful, humble, smile a
lot, and you will find that the locals are helpful and gracious once out of
the tourist areas.

Go soon, it is changing very rapidly.

The condo commandos are now well entrenched and gaining ground by the hour.